As I lost braking power I moved the barrel adjuster hoping to help the situation but it is apparently a "no-no" with these calipers. TRP recommends a bleed too but all worked fine once I put the barrel adjuster fully clock-wise. while this might be obvious to some I sorta think TRP should emphasize that the barrel adjuster should not be moved out beyond 1.5 turns.
From TRP: "When setting up the calipers there shouldn’t be more then 1.5 turns of the barrel adjuster, yours have way more then that. The improper setup closed the system off from the revisor so it cannot compensate for pad wear, and is why you cannot reset the pistons. Internally your master cylinder piston is sitting too far forward so it blocks the small port that connects the reservoir to the rest of the system.
I would remove the brakes and undo any adjustments done to the brake, then bleed the brake to make sure the oil is topper off and clean. Once bled and pistons rested I would set the brakes up per the setup video."